Civil Engineering and Architecture 11(4): 1719-1748, 2023 http://www.hrpub.org DOI: 10.13189/cea.2023.110408 Impacts of Developing Indoor Environmental Quality on Patients' Health and Occupants' Productivity in Hospital Buildings Hossam Elsharkawi * , Alaa Mohamed Shams Eldin Eleishy, Ibrahim Rizk Hegazy Department of Architecture Engineering, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt Received January 10, 2023; Revised February 24, 2023; Accepted March 19, 2023 Cite This Paper in the Following Citation Styles (a): [1] Hossam Elsharkawi, Alaa Mohamed Shams Eldin Eleishy, Ibrahim Rizk Hegazy , "Impacts of Developing Indoor Environmental Quality on Patients' Health and Occupants' Productivity in Hospital Building," Civil Engineering and Architecture, Vol. 11, No. 4, pp. 1719 - 1748, 2023. DOI: 10.13189/cea.2023.110408. (b): Hossam Elsharkawi, Alaa Mohamed Shams Eldin Eleishy, Ibrahim Rizk Hegazy (2023). Impacts of Developing Indoor Environmental Quality on Patients' Health and Occupants' Productivity in Hospital Building. Civil Engineering and Architecture, 11(4), 1719 - 1748. DOI: 10.13189/cea.2023.110408. Copyright©2023 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract Indoor Environmental Quality (IEQ) in healthcare buildings indicates the quality level of an environment of hospital buildings concerning the building occupants’ health and well-being and of those utilizing the hospital buildings’ amenities. The quality of the indoor environment of a hospital buildings is determined by many aspects, comprising internal natural and artificial lighting, air quality, damp environments, thermal conditions, visuality, the comfort of acoustic level, the approach of emissions-based (low-emission materials), controlling source, and observing for occupant-determined contaminants (superior strategies of indoor air quality), and advanced metrics of natural lighting (daylight). Occupants and patients inside hospitals building are often worried about the exposure to contaminants causing prospective symptoms and health conditions and dissatisfaction inside hospital buildings where they perform duties or pay visits. Most of these concerning symptoms get better when building occupants are not inside the hospital buildings. Although the previous studies related to the research context have addressed some respiratory symptoms and infections that are associated with damp spaces in hospital buildings, the concern is still unclear especially since indoor contaminants’ measurements indicate that occupants and patients are at risk of disease. In most cases, wherever the occupants and physicians doubt that the hospital buildings' environment is affecting the occupants' health condition, the available information from medical investigations about the surrounding environment is unclear and insufficient for establishing which contaminants are accountable. Despite uncertainty concerning what to measure and how to explain what is measured, research shows that the symptoms related to hospitals are associated with characteristics of buildings including dampness, sanitation, and ventilation as well. Therefore, this demand focuses on increasing indoor quality contaminant and infection levels within hospital buildings spaces for patients, employees, visitors, and all occupants, including for differently-abled air and surface temperature, humidity, air movement, and quality view. The study highlighted providing better indoor environmental quality and promoting sustainability for healthy patient rooms within hospital buildings to face any prospective pandemic with a minimum negative impact on buildings’ occupants and Energy Consumption. Developing internal spaces of hospital buildings with the proposed parametric design framework in the design stage will reduce the risk of air pollution exposure, and infection, and sustain public health. Keywords Indoor Environmental Quality (IEQ), Healthcare, Well-being, Air Quality, Public Health, Sustainability, Patient, Energy Consumption